Friction in Metal Forming Processes
Keywords:
Friction, sliding sticking, coefficient, factor, force, forming, processAbstract
Friction is a guessing game in spite of advances in the science of tribology. Still it is an important factor to be controlled to get good surface finish, reduce forces and increase formability. Friction factor ‘m’ is more convenient in metal forming rather than friction coefficient ‘m’. Latter decreases inversely with interface pressure and can lead to misinterpretation of forces. The former is independent of normal stress. More over it is easily measurable and leads to simplification of analysis of forces for metal working processes. It varies from zero for perfect sliding to one for sticking.
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References
G. E. Diter Mechanical Metallurgy, McGra Hill, London 1988 Part IV
N.Vidhyshanker, K. S. Anand, A. C. Mithun & K. Srinivasan, Friction Factor of CP Aluminium & Aluminium – Zinc Alloys, Bulletin of Material Science Vol. 29 N0. 7, Dec 2006, pp 685 – 688
D. N. Varun Bhat, V.B. Sharma and K. Srinivasan Friction Factor of CP Aluminium & Aluminium – Zinc and Aluminium – zinc- Magnesium Alloys, at Elevated Temperatures, Aluminum in India vol6 No4 Jan 2007 pp21-24
ASM Hand Book ,Bulh Forming,Vol. 14, Friction During Metal Forming, pp 59 – 69
